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A047520 as a simple table

n a(n)
0 0
1 1
2 6
3 21
4 58
5 141
6 318
7 685
8 1434
9 2949
10 5998
11 12117
12 24378
13 48925
14 98046
15 196317
16 392890
17 786069
18 1572462
19 3145285
20 6290970
21 12582381
22 25165246
23 50331021
24 100662618
25 201325861
26 402652398
27 805305525
28 1610611834
29 3221224509

[0,1,6,21,58,141,318,685,1434,2949,5998,12117,
 24378,48925,98046,196317,392890,786069,1572462,
 3145285,6290970,12582381,25165246,50331021,
 100662618,201325861,402652398,805305525,
 1610611834,3221224509]

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Last modified May 9 13:34 EDT 2024. Contains 372351 sequences. (Running on oeis4.)